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134 lines
3.3 KiB
134 lines
3.3 KiB
/* |
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** Copyright 2015, The Android Open Source Project |
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** |
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** Licensed under the Apache License, Version 2.0 (the "License"); |
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** you may not use this file except in compliance with the License. |
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** You may obtain a copy of the License at |
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** |
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** http://www.apache.org/licenses/LICENSE-2.0 |
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** |
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** Unless required by applicable law or agreed to in writing, software |
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** distributed under the License is distributed on an "AS IS" BASIS, |
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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** See the License for the specific language governing permissions and |
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** limitations under the License. |
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*/ |
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.macro pixel dreg src f sR sG sB shift |
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#if __mips==32 && __mips_isa_rev>=2 |
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/* extract red */ |
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ext $t4,\src,\shift+11,5 |
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mul $t4,$t4,\f |
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/* extract green */ |
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ext $t5,\src,\shift+5,6 |
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mul $t5,$t5,\f |
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/* extract blue */ |
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ext $t6,\src,\shift,5 |
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mul $t6,$t6,\f |
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#else |
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/* extract red */ |
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srl $t4,\src,\shift+11 |
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andi $t4, 0x1f |
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mul $t4,$t4,\f |
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/* extract green */ |
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srl $t5,\src,\shift+5 |
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andi $t5, 0x3f |
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mul $t5,$t5,\f |
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/* extract blue */ |
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srl $t6,\src,\shift |
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andi $t6, 0x1f |
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mul $t6,$t6,\f |
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#endif |
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srl $t4,$t4,8 |
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srl $t5,$t5,8 |
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srl $t6,$t6,8 |
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addu $t4,$t4,\sR |
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addu $t5,$t5,\sG |
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addu \dreg,$t6,\sB |
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sll $t4,$t4,11 |
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sll $t5,$t5,5 |
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or \dreg,\dreg,$t4 |
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or \dreg,\dreg,$t5 |
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andi \dreg, 0xffff |
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.endm |
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.text |
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.balign 4 |
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.global scanline_col32cb16blend_mips |
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.ent scanline_col32cb16blend_mips |
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scanline_col32cb16blend_mips: |
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/* check if count is zero */ |
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srl $v0,$a1,24 /* sA */ |
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beqz $a2,done |
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li $t4, 0x100 |
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srl $v1,$v0,7 |
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addu $v0,$v1,$v0 |
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subu $v0,$t4,$v0 /* f */ |
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#if __mips==32 && __mips_isa_rev>=2 |
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ext $a3,$a1,3,5 /* sR */ |
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ext $t0,$a1,10,6 /* sG */ |
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ext $t1,$a1,19,5 /* sB */ |
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#else |
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srl $a3, $a1, 3 |
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andi $a3, 0x1f /* sR */ |
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srl $t0, $a1, 10 |
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andi $t0, 0x3f /* sG */ |
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srl $t1, $a1, 19 |
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andi $t1, 0x1f /* sB */ |
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#endif |
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/* check if cnt is at least 4 */ |
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addiu $a2,$a2,-4 |
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bltz $a2,tail |
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loop_4pixels: |
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lw $t7,0($a0) |
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lw $t8,4($a0) |
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addiu $a0,$a0,8 |
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addiu $a2,$a2,-4 |
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pixel $t2 $t7 $v0 $a3 $t0 $t1 0 |
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pixel $t3 $t7 $v0 $a3 $t0 $t1 16 |
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#if __mips==32 && __mips_isa_rev>=2 |
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ins $t2,$t3,16,16 |
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#else |
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sll $t3, 16 |
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or $t2, $t2, $t3 |
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#endif |
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pixel $t7 $t8 $v0 $a3 $t0 $t1 0 |
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pixel $t3 $t8 $v0 $a3 $t0 $t1 16 |
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#if __mips==32 && __mips_isa_rev>=2 |
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ins $t7,$t3,16,16 |
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#else |
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sll $t3, 16 |
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or $t7, $t7, $t3 |
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#endif |
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sw $t2,-8($a0) |
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sw $t7,-4($a0) |
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bgez $a2, loop_4pixels |
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tail: |
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/* the pixel count underran, restore it now */ |
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addiu $a2,$a2,4 |
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/* handle the last 0..3 pixels */ |
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beqz $a2,done |
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loop_1pixel: |
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lhu $t7,0($a0) |
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addiu $a0,$a0,2 |
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addiu $a2,$a2,-1 |
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pixel $t2 $t7 $v0 $a3 $t0 $t1 0 |
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sh $t2, -2($a0) |
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bnez $a2,loop_1pixel |
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done: |
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j $ra |
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.end scanline_col32cb16blend_mips
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